u could pic up a casing thats bin in the ground for a few years
put it in the stainless pin wash and u would think it just came out of the bag ...lol.
i think the pins are like 1mmx5mm long
so they can get into the primer pockets a lilttle...
back to the original poster ?...
i heard sum buying crushed walnut from pet shops for lizard cages
it doesnt have the rouge ( polish compound ) in it, if that helps...
i also have 2 vibratory tumblers and when i used to use them i used lymans walnut in one and lymans green corn cob in other.... the corn cob takes longer ....